bwrvip program overview.2.1 2.1 new gap b-rg-08 reactor pressure vessel material surveillance...

BWRVIP Program Overview

Chuck Wirtz, First EnergyBWRVIP Integration ChairmanEPRI-NRC Technical Exchange Meeting June 8-10, 2011

2© 2011 Electric Power Research Institute, Inc. All rights reserved.

Overview Outline

• Background• Structure and Organization• BWRVIP Guidelines and Implementation• Strategic Plan and Current Research Gaps• BWRVIP Major Tasks• NRC Submittals• Contact Information

Background


Background

• Shroud cracking in 1993-1994 confirmed that IGSCC of internals is a significant issue for BWRs

• BWR utility executives formed the BWRVIP in mid-1994 to proactively address BWR reactor vessel and internals material condition issues

• The goal was to lead industry toward proactive generic resolution of vessel and internals material condition issues with generic, cost- effective strategies

• Intergranular Stress Corrosion Cracking (IGSCC) in austenitic piping was a major issue for Boiling Water Reactors (BWRs) in the 1980s – susceptibility of reactor internals to IGSCC was also recognized


BWRVIP Objectives

• Lead industry toward proactive generic resolution of vessel and internals material condition issues

• Identify or develop generic, cost- effective strategies from which each operating plant will select the alternative most appropriate to their needs

• Serve as a focal point for the regulatory interface with the industry in BWR vessel and internals material condition issues (including license renewal)

• Share information among members to obtain useful data from many sources

Structure and Organization


BWRVIP Member Utilities

U. S. (14 utilities, 35 units)• Constellation Nuclear, Nine Mile Point LLC• DTE Energy• Energy Northwest• Entergy• Exelon• FirstEnergy• FPL Energy Duane Arnold• Nuclear Management Co.• PPL Susquehanna, LLC• Progress Energy• PSEG Nuclear• Southern Nuclear Company• Tennessee Valley Authority• Xcel Energy

International (13 utilities, 43 units)• BKW FMB Energie AG – Switzerland• Chubu Electric Power Company – Japan• Chugoku Electric Power Company – Japan• Comision Federal de Electricidad – Mexico• Forsmarks Kraftgrupp AB – Sweden• Iberdrola Generation – Spain• Japan Atomic Power Company – Japan• Kernkraftwerk Leibstadt – Switzerland• Nuclenor – Spain• OKG Aktiebolag – Sweden• Ringhals AB – Sweden• Taiwan Power Company – Taiwan• Tokyo Electric Power Company – Japan


PMMP Executive Committee

EPRI Structure

Nuclear Power Council

Action Plan Committee

Materials

BWR Vessel Internals Program

Materials Reliability Program

Steam Generator Management Program

Water Chemistry Program

Primary System Corrosion Research

BWRVIP Executive Committee

Action Plan Committee

NDE

Action Plan CommitteeSeven (7) AdditionalOther Non-Materials

Welding & Repair Technology Center


BWRVIP Organization

Assessment Committee

Paul Davison, PSEG NuclearExecutive Chair

Randy Schmidt, PSEG NuclearTechnical Chairman

Bob CarterEPRI Task Manager

Mitigation Committee

Rob Whalen, TVAExecutive Chair

Drew Odell, ExelonTechnical Chairman

Raj PathaniaEPRI Task Manager

Integration CommitteeChuck Wirtz, FirstEnergy, Technical Chairman

Randy Stark, EPRI Task Manager

Dennis Madison, Southern Nuclear Vice Chairman

Repair Focus GroupDenver Atwood, Chairman, Southern Nuclear

Ken Wolfe, EPRI Task Manager

Inspection Focus GroupRich Ciemiewicz, Chairman, ExelonJeff Landrum, EPRI Task Manager

Oscar Limpias Entergy

Chairman, BWROG

Dave Czufin Exelon

Chairman


Technical Committee Responsibilities

Assessment -- What needs to be inspected, when it needs to be inspected, inspection options, how to disposition observed degradation

Inspection -- How to inspect, what equipment and techniques are available, what are the associated uncertainties

Repair/replace -- What repair/replacement techniques are available and what are the associated requirements that must be met

Mitigation -- How can SCC degradation be prevented or reduced

BWRVIP Guidelines and Implementation


BWRVIP Guidelines to Manage Degradation

Assessment Inspection Repair/Replace MitigationComponent (I&E) Guidelines Guidelines Design Criteria RecommendationsCore shroud BWRVIP-76-A BWRVIP-03 BWRVIP-02-A/-04-A BWRVIP-62-A/-190

Core spray BWRVIP-18-A BWRVIP-03 BWRVIP- 16-A/-19-A/-34 N/A

Shroud support BWRVIP-38 BWRVIP-03 BWRVIP-52-A BWRVIP-62-A/-190

Top Guide BWRVIP-26-A BWRVIP-03 BWRVIP-50-A N/A

Core Plate BWRVIP-25 BWRVIP-03 BWRVIP- 50-A BWRVIP-62-A/-190

SLC BWRVIP-27-A BWRVIP-03 BW RVIP-53-A BWRVIP-62-A/-190

Jet pump assembly BWRVIP-41 BWRVIP-03 BWRVIP- 51-A BWRVIP-62-A/-190

CRD guide/stub tube BWRVIP-47-A BWRVIP-03 BWRVIP-17/-55-A/-58-A BWRVIP-62-A/-190

In-core housing/dry tube BWRVIP-47-A BWRVIP-03 BWRVIP-17/-55-A BWRVIP-62-A/-190

Instrument penetrations BWRVIP-49-A BWRVIP-03 BWRVIP-57-A BWRVIP-62-A/-190

LPCI coupling BWRVIP-42-A BWRVIP-03 BWRVIP-56-A N/A

Vessel ID brackets BWRVIP-48-A BWRVIP-03 BWRVIP-52-A BWRVIP-62-A/-190

Reactor pressure vessel BWRVIP-74-A N/A N/A N/A

Primary system piping BWVIP-75-A N/A N/A BWRVIP-62-A/-190

Steam dryer BWRVIP-139-A BWRVIP-03 BWRVIP-181-A N/A

Access hole cover BWRVIP-180 BWRVIP-03 BWRVIP-217 BWRVIP-62-A/-190

Top guide grid beam BWRVIP-183 BWRVIP-03 BWRVIP-50-A N/A

Bottom head drain line BWRVIP-205 N/A BWRVIP-208 N/A


Utility Implementation of BWRVIP Guidelines

• Utilities have committed to implement BWRVIP guidelines:– BWRVIP letters to NRC– Consistent with Nuclear Energy Institute (NEI) 03-08 Guideline for

Management of Materials Issues• BWRVIP-94 establishes framework for implementing BWRVIP

guidance:– Develop/strengthen inspection program consistent with BWRVIP

guidelines– Implement BWRVIP guidelines (as approved by Executive

Committee) within two refueling outages– Notify NRC within 45 days of plans not to implement NRC-

approved guidelines– Deviations from BWRVIP guidelines require a deviation

disposition


Assessing Implementation

• INPO assesses utility implementation of BWRVIP products through the Review Visit process

• INPO provides the results of the Review Visits to the BWRVIP twice yearly

• BWRVIP transmits the results to the all BWRVIP committee members

• Results of INPO Review Visits are also used to improve the BWRVIP program, processes and identify needs (report revisions, clarifications, etc.)

• In accordance with Section 5.11 of NEI 03-08, Rev 2, Self Assessments of the Program performed every 2 years

Strategic Plan and Current Research Gaps


NEI 03-08 Integrated Materials Issues Strategic Plan

• Provides Systematic Approach to Managing Materials Issues– Identify vulnerabilities– Assess condition (inspect & evaluate)– Mitigate degradation initiation and propagation

mechanism– Repair or replace as required

• Approach Used:– Degradation Matrix and Issue Management Tables

• Degradation Matrix and Issues Management Tables to be maintained as living documents with annual updates


Issue Management Table(s)

• BWRVIP Prepared the BWR IMTs – Utilized BWRVIP-06, Safety Assessment– Information reflects current state of the BWRVIP

Program– Identified and prioritized “gaps”– Published as BWRVIP-167, Revision 2 in 2010– New gap prioritizations (High, Medium & Low) were

identified in December 2010 and are reflected in the following slides


2011 IMT High Priority Gaps

Gap 2010BWRVIP Tasks

2011BWRVIP Tasks Changes

B-AS-18 Jet Pump Degradation Management 2.17 2.17B-I&E-07 NDE Capability: RPV Drain Line 2.16, 2.27 2.16, 2.27B-AS-10 Assess Impact of High Fluence SCC Crack Growth Rates 2.5, 2.6, 2.13 2.5, 2.6, 2.13B-AS-17 Evaluate Hidden Weld Locations (Thermal Sleeves) 2.14 (2008) 2.14 (2008)B-MT-02 Demonstrate Improved ECP Model 3.2 3.2B-MT-05 Startup & Shutdown Chemistry 3.1, 3.6 3.1, 3.7, 3.10B-AS-26 Assess Alloy X-750 SCC Susceptibility 2.15 2.15B-I&E-03 NDE Capability: Shroud & Shroud Support Locations 2.27 2.27B-AS-29 Steam Dryer Evaluation Methodology 2.8 2.8B-DM-06 Environmental Effects on Fracture Resistance PSCR PSCRB-RR-02 Develop Welding Processes for Repair of Irradiated Material 2.21 2.21B-RG-09 Management of License Renewal Issues Many Many New GapB-AS-32 Assessment of Core Plate Rim Hold Down Bolts 2.18 2.18 New GapB-RG-05 Evaluation of EVT-1 2.27, 2.28 2.27, 2.28 Medium to HighB-MT-04 NMCA Technology Improvement 3.1, 3.5, 3.8 3.1, 3.5, 3.8, 3.9,

3.13 Medium to HighB-AS-07 Environmental Fatigue Issues: Pressure Boundary 2.11, 2.30, 2.31 Medium to HighB-AS-09 Assess Impact of High Fluence on Fracture Toughness 2.5, 2.7, 2.xx 2.5, 2.7, 2.34


2011 IMT Medium Priority Gaps



B-RR-06 Develop Repair Solutions for Bottom Head Drain Line Locations

2.2 2.2 High to Medium

B-AS-27 Alloy 182/Creviced Alloy 600 SCC SusceptibilityB-AS-28 Impact of BWR Nozzle Penetrations on Pressure-Temperature Limit Curves

BWROG BWROG

B-MT-01 Development of Alternative Mitigation TechnologiesB-I&E-02 NDE Capability: Hidden Locations (Thermal Sleeves & Piping)

2.27 2.27

B-AS-05 Fluence Spectra Effects: C&LASB-I&E-01 NDE Capability: Core Plate Rim Hold Down BoltsB-AS-15 High Cycle Fatigue: Reactor Internals 2.8 2.8, 2.31B-RR-05 Develop Alternate High-Strength MaterialsB-RR-08 Availability of Laser Welding for Repairs to Highliy Irradiated Components

2.21 2.21

B-DM-07 Chloride Transient Effects on Low Alloy Steel Crack Growth Rates

3.10 New Gap

B-AS-30 Material Surveillance Program Implementation for 80 Year Service Lives

2.1 2.1 New Gap

B-RG-08 Reactor Pressure Vessel Material Surveillance Program Implementation for 80 Year Service Lives

2.1, 2.27 2.1, 2.27 New Gap

B-AS-22 High Cycle Thermal Fatigue - Piping Locations Low to Medium


2011 IMT Low Priority Gaps



B-AS-31 BWRVIP-47-A (CRGT) Re-Inspection Requirements 2.13 2.13 New GapB-AS-20 Assess Non-Safety Locations Medium to LowB-I&E-05 NDE Capability: Appendix VIII Compliance 2.27 2.27B-AS-14 Environmental Fatigue Effects: Reactor Internals 2.11, 2.31B-AS-11 Assess Fast Reactor Data Applicability to BWR Environment 2.5 2.5B-AS-19 In-Vessel Fastener LooseningB-I&E-08 Develop Inspection and Evaluation Guidance for RepairsB-I&E-06 NDE Capability: CASS WeldmentsB-AS-12 Thermal & Irradiation Embrittlement: Synergistic Effects (on CASS BWR Reactor Internals)B-DM-03 Low Temperature Crack Propagation PSCR PSCRB-I&E-09 Examination Technologies for Detection of Stress Relaxation in Reactor Internals ComponentsB-DM-10 Long Term Stress Stability (LTO Based Gap) New GapB-DM-08 Long Term Neutron Fluence Effect on Low Alloy Steel Cracking Susceptibility New GapB-DM-09 Long Term SCC Susceptibility (Late Life Initiation) New Gap

Major BWRVIP Tasks


2011 Major Deliverables

• Completion of Jet Pump Full Scale Facility and Phenomenological Tests• Jet Pump Pipe-in-Pipe Testing Report• Evaluation of Jet Pump Operational Data• Evaluation of Hatch Shroud Cracking (Evaluation Strategy report only)• Core Spray Inspection Optimization• Steam Dryer Vane Passing Frequency Load Methodology• Online NobleChem Flow Deposition and Flow Effects Study• Online NobleChem Durability Study• BWRVIP-62, Revision 1 (Lower Plenum Credit and OLNC)• BWRVIA Revision 3.1• Safety Evaluation for NDE Uncertainty• Safety Evaluation for BWRVIP-194, Steam Dryer Loads Methodology

Submittals to the NRC


Recent Submittals to NRC

• BWRVIP-03, Revision 13 (RPV and internals examination guidelines)• BWRVIP-62-A (technical basis for inspection relief for internal

components with hydrogen injection)• BWRVIP-111NP, Revision 1 (testing and evaluation of BWR SSP

capsules E, F and I)• BWRVIP-167NP, Revision 2 (BWR issue management tables)• BWRVIP-181-A (steam dryer repair design criteria)• BWRVIP-182-A (guidance for demonstration of steam dryer integrity

for power uprate)• BWRVIP-234 (thermal aging and neutron embrittlement of CASS for

BWR internals)• BWRVIP-241 (probabilistic fracture mechanics evaluation of BWR

nozzle-to-vessel shell welds and nozzle blend radii)


Final Safety Evaluations from the NRC in the Near Term

• Received:– BWRVIP-173 (evaluation of chemistry data for BWR

nozzle forging materials)• Expected:

– Non-Destructive Examination uncertainty– BWRVIP-18, Revision 1 (core spray I&E guidelines)– BWRVIP-86, Revision 1 (updated BWR integrated

surveillance program plan)– BWRVIP-138, Revision 1 (updated jet pump beam

IE&E guidelines)– BWRVIP-183 (top guide grid beam I&E guidelines)


Expected Near Term Submittals

• BWRVIP-62, Revision 1 (technical basis for inspection relief for internal components with hydrogen injection)

• BWRVIP-76, Revision 1 (core shroud I&E guidelines)• BWRVIP-84, Revision 1 (guidelines for selection and use of materials

for repairs to BWR internal components)• BWRVIP-100, Revision 1 (updated assessment of the fracture

toughness of irradiated stainless steel for BWR core shrouds)• BWRVIP-158-A (flaw proximity rules for assessment of BWR

internals)• BWRVIP-173-A (evaluation of chemistry data for BWR nozzle forging

materials)• BWRVIP-XXX (technical basis for revision of the BWRVIP-18 core

spray inspection program)


Need More Info?

• Contact the Utility Technical Chairman, Chuck Wirtz, FirstEnergy 440-280-7665 (w), 440-346-7124 (c), [email protected]

Or …• Talk with EPRI BWRVIP Task Managers

– Program Manager: Randy Stark 650 855 2122 [email protected]– Inspection: Jeff Landrum 704 595 2553 [email protected]– Assessment: Bob Carter 704 595 2519 [email protected]– Repair: Ken Wolfe 650 855 2141 [email protected]– Mitigation: Raj Pathania 650 855 8762 [email protected]– Also:

• Larry Steinert 650 855 2140 (general BWRVIP support)• Robin Dyle 205 426 5371 [email protected]

mailto:[email protected]








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